The results show, compared with sample without chelating agent,toxicity of leachate of the cement waste forms reduces by 66 4%, and far lower than 1 5 mg/L.

• 结果表明 ,添加高分子螯合剂后的固化体的浸出毒性降低 6 6 4%25 ,远远小于国家标准的1 5mg/L ;